How to get past and future dates in JAVA

Java Code to get the current date, previous date and future date.

Import libraries ::
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.GregorianCalendar;


CODE::
DateFormat format = new SimpleDateFormat("MM-dd-yyyy");
Calendar date = new GregorianCalendar();
System.out.println("Current Date :: " + format.format(date.getTime()));
date.add(Calendar.DATE, -30);
System.out.println("Previous Date :: " + format.format(date.getTime()));
date = new GregorianCalendar();
System.out.println("Current Date :: " + format.format(date.getTime()));
date.add(Calendar.DATE, +30);
System.out.println("Next Date :: " + format.format(date.getTime()));